I use an Indy sparkle(integy) or a small jewlery cleaner(ultra sonic) and parts washing fluid from an auto parts store. You can also round the tip of a hobbie knife blade to remove the rubber seals. Metal shielded require a little more effort. Look at the outside edge of the sheild and you can see the about half of the clip. Follow this around until you see the gap. Look at the ends of the clip and one end will be angled so that you can get a stick pin behind its edge. Dont stab your self and be gentle so you dont send the clip flying. I remove all the grease clean and lightly reOIL. Running on clean tracks I'll do this every two to three races.

Cold parts cleaner, parts washer fluid from an autoparts store. Do not use the carb cleaner. They sell it in one gallon buckets it is not a spray. The jewlery cleaners are like 15 bucks at walmart,target etc. the Indy sparkle is on www.integy.com.

hey guys
i was at our track today and i feel that the mrx-4 needs more top end..
it was peaking out rpm at 3/4 down the straight.. i even tried adjusting the 2 speed to shift later.

the bottom end was fine..wats a good gear combination i can use to get more revs in the top end?

im using a os vz-r version 2 engine..could it be the engine maxing out rpm?

thanks
john

What pipe are you running with it? I know this motor isn't much of a beast on top end, but for the small to medium sized tracks is pretty decent. Infact, how big is your track? I'd step upto the Mega ZX21 '06 version if you want something inexpensive, but will hang with the other motors. I saw that most racers aren't too far off from the stock gear ratio on the MRX4 and or just change from the 17T pinion on first gear to the 16T.

What pipe are you running with it? I know this motor isn't much of a beast on top end, but for the small to medium sized tracks is pretty decent. Infact, how big is your track? I'd step upto the Mega ZX21 '06 version if you want something inexpensive, but will hang with the other motors. I saw that most racers aren't too far off from the stock gear ratio on the MRX4 and or just change from the 17T pinion on first gear to the 16T.

Hi
thanks..im using a novarossi pipe its a 2015 with 3 fin header.
the track has 19 corners and 1 long straght with a sweeper at the end. im thinking of getting the vzr modified to increase the top end. it was cheap to start with..

im trying to find a piston liner for my m-rossi rex pr350 that should have heaps of power to get around.

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